Black-red to 'cherry'-red prismatic crystals of Mangan-neptunite, up to 6 mm size from the type locality.
From the ex collection of S.Maggia.
Formula :
KNa2Li(Mn2+,Fe2+)2Ti24+[O/Si4O11]2
System: monoclinic Hardness:5-6 Rarity:rare
Strunz id:VIII/F.37-20 -
SILICATES
Name origin: For the preponderance of manganese in this chemical variant of the neptunite structure.
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 Specimen weight:10 gr.
 Crystal size:Up to 6 mm
 Overall size: 30mm x 23 mm x 15 mm
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